William oakes and james oakes



UNITED STATES PATENT Orricn.

SPECIFICATION forming part of Letters Patent No. 511,026, dated December19, 1893.

Application filed September 5, 1893- Serial No. 484,874. (No model.)

of which the following is a specification.

This invention relates to improvements in the construction of kilns forbrick, lime and the like, and has for its object to provide an improvedmeans whereby the heat commonly wasted in letting the fully burnedmaterial cooll will be utilized for heating the raw materia Under thefloor of the kiln around the central dividing wall a continuous flue isprovided, having branches leading into the chamber, two into eachdivision. One of these leads into the division through the roof and theother through the floor of the chamber, each being furnished with adamper to regulate the aperture or close the flue. The heat from theburning material will pass through the upper flue when opened, thencedownward into the main flue and into the division containing the rawmaterial when the damper governing that part is opened, thustransferring the heat otherwise wasted to the cooler parts.

In order that the invention may be more clearly understood, reference ishad to the accompanying drawings, in which- Figure 1 is a plan partly insection and Fig. 2 is a cross section of a kiln constructed according toour invention.

A is the kiln with door a and roof a constructed in any ordinary mannerand furnished with the usual flues and openings for charging andemptying. Under the floor and around the central division a is placedthe continuous flue B, from which at the required intervals the branchdoes I) pass through the partition a and the roof a to the top of thekiln opening into the latter at about the center as shown. Atcorresponding intervals the branches 1) are provided opening from theline B into the lower part of the kiln. The branch fiues b and b are allfurnished with dampers b and 12 having the necessary rods and handles sothat any flue can be opened or closed irrespective of the rest. The endfiues b are preferably connected together and have only one branchpassing to the main flue B, so that less space will be occupied in thedivision (1?. It will be seen that with this arrangement on opening anytop flue of a division containing burned orburning material, and abottom flue b at any other part generally at the other side or end, thehot air will pass through the dues in to the central flue B and thenceto the cool division through the open flue 1). Owing to the heated aircoming into the cool part through the floor it willbe caused to passthrough the material much more thoroughly than by introducing it fromthe top, drawing the heat freely from the top of the heated material.

What We claim as our invention, and desire to secure by Letters Patent,is-

An improved means for utilizing waste heat in brick and like kilns,consisting of a continuous flue around the middle division of the kilnand under the floor, having two sets of branch fines, each fluefurnished with a damper passing respectively through the roof and floorof the kiln, and opening into the latter at top and bottom arrangedsubstantially as and for the purposes specified.

In Witness whereof We have hereunto set our hands this 10th day ofAugust, 1893.

WILLIAM OAKES. JAMES OAKES. In presence of- EDWD. WHITELEY, JosH. HY.WHITAKER,

Solicitor? Clerks, Leeds.

